Heliobatis radians, Knightia eocaenaEoceneGreen River Formation, Fossil Butte Member, Lincoln County, WyomingFine preservation in the most minute details is seen in this marvelous freshwater stingray from the prehistoric system of three lakes known as the Green River Formation. The attractive golden-hued limestone matrix is from the F-2 Horizon of this famous geologic formation. The present large stingray is accompanied by three Knightia eocaena fish, the state fossil of Wyoming. The limestone matrix is offered with a wood backing. Matrix measuring 43 x 24 in; Stingray measuring 22 ½ x 11 in